Why does a PST File Not Open on a Mac?
A PST file is an Outlook for Windows data file. macOS has no app that reads the format by itself.
Apple Mail imports its own mailboxes and MBOX files. Apple lists no PST source on its page for importing mailboxes into Mail.
| Route | App | Cost |
|---|---|---|
| Import the PST file | Legacy Outlook | Free |
| Import in a recent build | New Outlook with an Import command | Free |
| Convert the file to MBOX | Apple Mail or Thunderbird | Paid |
How does Legacy Outlook Import a PST?
Method #1: Legacy Outlook Import (Free)
Who it suits. Users who still use the legacy client. Extra application. None.
- Copy the PST file from the Windows PC to your Mac with a USB drive or cloud storage.
- Start legacy Outlook and select File, then Import.
- Choose Outlook for Windows archive file (.pst) and select Continue.
- Locate the PST file and select Import.
- Select Finish when the import ends.
The imported items appear under On My Computer. Microsoft lists the same steps on its page on PST import for legacy Outlook for Mac.
Open Outlook, then Settings, then General when On My Computer is absent. Clear Hide On My Computer folders.
Heads Up. Microsoft ends support for legacy Outlook in October 2026. The import command is a legacy feature, so test it before the date.
Does New Outlook Read PST Files on a Mac?
Method #2: New Outlook (Free)
Use it when. You already switched to the new client. Extra application. None.
The Import and Export commands were greyed out in earlier builds of the new client. A Microsoft Q&A moderator says those commands exist only in legacy Outlook.
The Microsoft 365 roadmap now lists PST import for Outlook for Mac with a June 2026 release date. News reports say version 16.110 shipped the feature.
Microsoft support pages still describe the import for the legacy client only. Open File in your build and look for an Import command before you plan around it.
The new client does not import a local OLM file in older builds either. Read the guide to convert OLM to PST for the opposite direction.
How do You Move PST Mail Into Apple Mail?
Method #3: Convert PST to MBOX (Paid)
Who it suits. Users with no Outlook on the Mac. Extra application. Mac PST Converter.
- Start SysTools PST Converter for Mac and select Add Files or Add Folders.
- Choose the PST file and wait for the folder preview.
- Select Export and choose MBOX.
- Set the filters in Advanced Settings and select a destination folder.
- Select Export and wait for the message that the export ended.
The Mac version of the software exports MBOX and other mail formats. The free demo exports 25 items per folder.
Import the MBOX file in Apple Mail with File, Import Mailboxes and Files in mbox format. Follow the guide to import Outlook PST to Mac Mail for the full steps.
What are the Limits of These Methods?
- The Mac client imports a PST file from Outlook for Windows only.
- The PST file must sit on the Mac disk before you import it.
- Microsoft ends legacy support in October 2026.
- MBOX holds mail only, so contacts and calendars need another route.
- A converter demo exports 25 items per folder.
- A large PST file needs free disk space for the converted copy.
Heads Up. Copy the PST file before you import it. Retain the original file until you check the item count on your Mac.
Where Else do You Go From Here?
- Follow the guide to export and import PST files in Outlook for Mac for the Mac steps.
- Read the guide to migrate Outlook for Mac to Windows to move to a PC.
- Use the guide to transfer emails from Outlook for Mac to Apple Mail for the reverse move.
- See the guide to add a PST file to Outlook for Windows.
Frequently Asked Questions
Can a Mac Open a PST File?
Not directly. Legacy Outlook imports the file. A converter exports the file to MBOX for Apple Mail.
Can Apple Mail Read a PST File?
No. Apple Mail imports its own mailboxes and MBOX files only.
How do You Import a PST File Into Outlook for Mac?
Choose File, Import and Outlook for Windows archive file (.pst). Locate the file and select Import.
Does New Outlook Accept a PST File?
Older builds grey out the command. The Microsoft 365 roadmap lists PST import with a June 2026 date. Check File in your build.
Where do Imported PST Items Appear on a Mac?
Items appear under On My Computer in the navigation pane.
Do You Need Outlook to Read a PST File on a Mac?
No. A converter reads the file and exports it to MBOX, EML or PDF.
Can a Mac Create a PST File?
No. Outlook for Mac exports an OLM file. A converter changes the OLM file into PST.
Author's Verdict
Use legacy Outlook for a free import before Microsoft ends support.
Use a converter when you have no Outlook for Mac or need MBOX for Apple Mail.
Key Takeaways
- macOS has no app that reads a PST file by itself.
- The legacy client imports a PST file.
- MBOX is the route for Mac mail apps.
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